Gets a Firebase reference for the location at the specified relative path.
Firebase reference for the specified child location.Get a Firebase reference for the database location at the specified relative path. The relative path can either be a simple child name (e.g. "fred") or a deeper slash-separated path (e.g. "fred/name/first").
usersRef Firebase'https://samplechat.firebaseio-demo.com/users'fredRef usersRefchild'fred'fredFirstNameRef fredRefchild'name/first'fredFirstNameReftoString// path is now 'https://samplechat.firebaseio-demo.com/users/fred/name/first'